If the customer starts the shopping-processand have a order value of lets say US$ 90.00,and at a order value of US$ 100.00 we chargeno shipping fee, there should appear a window,which tells the customer: Buy for US$ 10.00 more,and you have not to pay the shipping fee.

Actually, you may be able to setup such a message window now by writing your own JavaScript function that will check the subtotal. To do this, on your "Place Order" page, try:

STEP 1: Add the "uShopJSI" applet somewhere your "Place Order" page. Usually this is done at the very bottom. See the "JavaScript Examples" in the uShop Applet Reference and/or the uShop Programmer's Guide for more information about putting hte "uShopJSI" applet on your page.

STEP 2: Upon putting the "uShopJSI" applet somewhere on your "Place Order" page, you can use the uShopJSI method "getSubtotal" to access the current subtotal. Do this using the syntax:

var subtotal = document.uShopJSI.getSubtotal();

STEP 3: Put that call to the "getSubtotal()" method in a JavaScript function such as: